{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-hbjbz6e8","versions":[{"created_at":"2026-06-10T22:52:26Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote25684102 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"668b989817b6d17a4873dece94761d38960c2990d6add291d2d96239ace21a98","version":22},{"created_at":"2026-06-10T13:31:28Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"a89553227f17dad90ed16eccbe08fd09aca1a1c067aba38025384159520cf8cf","version":8},{"created_at":"2026-06-10T11:59:58Z","element_count":68,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e8c0885ff231d0d6d16c0d3f7e6461263bb9a269fca9aa3c6fa191c2029d8664","version":3}]}